1859 lines
47 KiB
C
1859 lines
47 KiB
C
/* Top level for GDB, the GNU debugger.
|
||
Copyright (C) 1986, 1987, 1988, 1989 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
GDB is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 1, or (at your option)
|
||
any later version.
|
||
|
||
GDB is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with GDB; see the file COPYING. If not, write to
|
||
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
||
#include "defs.h"
|
||
#include "command.h"
|
||
#include "param.h"
|
||
|
||
#ifdef USG
|
||
#include <sys/types.h>
|
||
#include <unistd.h>
|
||
#endif
|
||
|
||
#include <sys/file.h>
|
||
#include <stdio.h>
|
||
#include <setjmp.h>
|
||
#include <signal.h>
|
||
#include <sys/param.h>
|
||
#include <sys/stat.h>
|
||
|
||
#ifdef SET_STACK_LIMIT_HUGE
|
||
#include <sys/time.h>
|
||
#include <sys/resource.h>
|
||
#include <ctype.h>
|
||
|
||
int original_stack_limit;
|
||
#endif
|
||
|
||
/* If this definition isn't overridden by the header files, assume
|
||
that isatty and fileno exist on this system. */
|
||
#ifndef ISATTY
|
||
#define ISATTY(FP) (isatty (fileno (FP)))
|
||
#endif
|
||
|
||
extern void free ();
|
||
|
||
/* Version number of GDB, as a string. */
|
||
|
||
extern char *version;
|
||
|
||
/*
|
||
* Declare all cmd_list_element's
|
||
*/
|
||
|
||
/* Chain containing all defined commands. */
|
||
|
||
struct cmd_list_element *cmdlist;
|
||
|
||
/* Chain containing all defined info subcommands. */
|
||
|
||
struct cmd_list_element *infolist;
|
||
|
||
/* Chain containing all defined enable subcommands. */
|
||
|
||
struct cmd_list_element *enablelist;
|
||
|
||
/* Chain containing all defined disable subcommands. */
|
||
|
||
struct cmd_list_element *disablelist;
|
||
|
||
/* Chain containing all defined delete subcommands. */
|
||
|
||
struct cmd_list_element *deletelist;
|
||
|
||
/* Chain containing all defined "enable breakpoint" subcommands. */
|
||
|
||
struct cmd_list_element *enablebreaklist;
|
||
|
||
/* Chain containing all defined set subcommands */
|
||
|
||
struct cmd_list_element *setlist;
|
||
|
||
/* Chain containing all defined \"set history\". */
|
||
|
||
struct cmd_list_element *sethistlist;
|
||
|
||
/* Chain containing all defined \"unset history\". */
|
||
|
||
struct cmd_list_element *unsethistlist;
|
||
|
||
/* stdio stream that command input is being read from. */
|
||
|
||
FILE *instream;
|
||
|
||
/* Current working directory. */
|
||
|
||
char *current_directory;
|
||
|
||
/* The directory name is actually stored here (usually). */
|
||
static char dirbuf[MAXPATHLEN];
|
||
|
||
/* The number of lines on a page, and the number of spaces
|
||
in a line. */
|
||
int linesize, pagesize;
|
||
|
||
/* Nonzero if we should refrain from using an X window. */
|
||
|
||
int inhibit_windows = 0;
|
||
|
||
/* Function to call before reading a command, if nonzero.
|
||
The function receives two args: an input stream,
|
||
and a prompt string. */
|
||
|
||
void (*window_hook) ();
|
||
|
||
extern int frame_file_full_name;
|
||
int xgdb_verbose;
|
||
|
||
void free_command_lines ();
|
||
char *gdb_readline ();
|
||
char *command_line_input ();
|
||
static void initialize_main ();
|
||
static void initialize_cmd_lists ();
|
||
void command_loop ();
|
||
static void source_command ();
|
||
static void print_gdb_version ();
|
||
static void float_handler ();
|
||
static void cd_command ();
|
||
|
||
char *getenv ();
|
||
|
||
/* gdb prints this when reading a command interactively */
|
||
static char *prompt;
|
||
|
||
/* Buffer used for reading command lines, and the size
|
||
allocated for it so far. */
|
||
|
||
char *line;
|
||
int linesize;
|
||
|
||
|
||
/* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
|
||
|
||
#ifndef STOP_SIGNAL
|
||
#ifdef SIGTSTP
|
||
#define STOP_SIGNAL SIGTSTP
|
||
#endif
|
||
#endif
|
||
|
||
/* This is how `error' returns to command level. */
|
||
|
||
jmp_buf to_top_level;
|
||
|
||
void
|
||
return_to_top_level ()
|
||
{
|
||
quit_flag = 0;
|
||
immediate_quit = 0;
|
||
clear_breakpoint_commands ();
|
||
clear_momentary_breakpoints ();
|
||
disable_current_display ();
|
||
do_cleanups (0);
|
||
longjmp (to_top_level, 1);
|
||
}
|
||
|
||
/* Call FUNC with arg ARG, catching any errors.
|
||
If there is no error, return the value returned by FUNC.
|
||
If there is an error, return zero after printing ERRSTRING
|
||
(which is in addition to the specific error message already printed). */
|
||
|
||
int
|
||
catch_errors (func, arg, errstring)
|
||
int (*func) ();
|
||
int arg;
|
||
char *errstring;
|
||
{
|
||
jmp_buf saved;
|
||
int val;
|
||
struct cleanup *saved_cleanup_chain;
|
||
|
||
saved_cleanup_chain = save_cleanups ();
|
||
|
||
bcopy (to_top_level, saved, sizeof (jmp_buf));
|
||
|
||
if (setjmp (to_top_level) == 0)
|
||
val = (*func) (arg);
|
||
else
|
||
{
|
||
fprintf (stderr, "%s\n", errstring);
|
||
val = 0;
|
||
}
|
||
|
||
restore_cleanups (saved_cleanup_chain);
|
||
|
||
bcopy (saved, to_top_level, sizeof (jmp_buf));
|
||
return val;
|
||
}
|
||
|
||
/* Handler for SIGHUP. */
|
||
|
||
static void
|
||
disconnect ()
|
||
{
|
||
kill_inferior_fast ();
|
||
signal (SIGHUP, SIG_DFL);
|
||
kill (getpid (), SIGHUP);
|
||
}
|
||
|
||
/* Clean up on error during a "source" command (or execution of a
|
||
user-defined command).
|
||
Close the file opened by the command
|
||
and restore the previous input stream. */
|
||
|
||
static void
|
||
source_cleanup (stream)
|
||
FILE *stream;
|
||
{
|
||
/* Instream may be 0; set to it when executing user-defined command. */
|
||
if (instream)
|
||
fclose (instream);
|
||
instream = stream;
|
||
}
|
||
|
||
|
||
int
|
||
main (argc, argv, envp)
|
||
int argc;
|
||
char **argv;
|
||
char **envp;
|
||
{
|
||
int count;
|
||
int inhibit_gdbinit = 0;
|
||
int quiet = 0;
|
||
int batch = 0;
|
||
register int i;
|
||
|
||
quit_flag = 0;
|
||
linesize = 100;
|
||
line = (char *) xmalloc (linesize);
|
||
instream = stdin;
|
||
|
||
getwd (dirbuf);
|
||
current_directory = dirbuf;
|
||
|
||
#ifdef SET_STACK_LIMIT_HUGE
|
||
{
|
||
struct rlimit rlim;
|
||
|
||
/* Set the stack limit huge so that alloca (particularly stringtab
|
||
* in dbxread.c) does not fail. */
|
||
getrlimit (RLIMIT_STACK, &rlim);
|
||
original_stack_limit = rlim.rlim_cur;
|
||
rlim.rlim_cur = rlim.rlim_max;
|
||
setrlimit (RLIMIT_STACK, &rlim);
|
||
}
|
||
#endif /* SET_STACK_LIMIT_HUGE */
|
||
|
||
/* Look for flag arguments. */
|
||
|
||
for (i = 1; i < argc; i++)
|
||
{
|
||
if (!strcmp (argv[i], "-q") || !strcmp (argv[i], "-quiet"))
|
||
quiet = 1;
|
||
else if (!strcmp (argv[i], "-nx"))
|
||
inhibit_gdbinit = 1;
|
||
else if (!strcmp (argv[i], "-nw"))
|
||
inhibit_windows = 1;
|
||
else if (!strcmp (argv[i], "-batch"))
|
||
batch = 1, quiet = 1;
|
||
else if (!strcmp (argv[i], "-fullname"))
|
||
frame_file_full_name = 1;
|
||
else if (!strcmp (argv[i], "-xgdb_verbose"))
|
||
xgdb_verbose = 1;
|
||
else if (argv[i][0] == '-')
|
||
i++;
|
||
}
|
||
|
||
/* Run the init function of each source file */
|
||
|
||
initialize_cmd_lists (); /* This needs to be done first */
|
||
initialize_all_files ();
|
||
initialize_main (); /* But that omits this file! Do it now */
|
||
initialize_signals ();
|
||
|
||
if (!quiet)
|
||
print_gdb_version ();
|
||
|
||
/* Process the command line arguments. */
|
||
|
||
count = 0;
|
||
for (i = 1; i < argc; i++)
|
||
{
|
||
register char *arg = argv[i];
|
||
/* Args starting with - say what to do with the following arg
|
||
as a filename. */
|
||
if (arg[0] == '-')
|
||
{
|
||
extern void exec_file_command (), symbol_file_command ();
|
||
extern void core_file_command (), directory_command ();
|
||
extern void tty_command ();
|
||
|
||
if (!strcmp (arg, "-q") || !strcmp (arg, "-nx")
|
||
|| !strcmp (arg, "-quiet") || !strcmp (arg, "-batch")
|
||
|| !strcmp (arg, "-fullname") || !strcmp (arg, "-nw")
|
||
|| !strcmp (arg, "-xgdb_verbose"))
|
||
/* Already processed above */
|
||
continue;
|
||
|
||
if (++i == argc)
|
||
fprintf (stderr, "No argument follows \"%s\".\n", arg);
|
||
if (!setjmp (to_top_level))
|
||
{
|
||
/* -s foo: get syms from foo. -e foo: execute foo.
|
||
-se foo: do both with foo. -c foo: use foo as core dump. */
|
||
if (!strcmp (arg, "-se"))
|
||
{
|
||
exec_file_command (argv[i], !batch);
|
||
symbol_file_command (argv[i], !batch);
|
||
}
|
||
else if (!strcmp (arg, "-s") || !strcmp (arg, "-symbols"))
|
||
symbol_file_command (argv[i], !batch);
|
||
else if (!strcmp (arg, "-e") || !strcmp (arg, "-exec"))
|
||
exec_file_command (argv[i], !batch);
|
||
else if (!strcmp (arg, "-c") || !strcmp (arg, "-core"))
|
||
core_file_command (argv[i], !batch);
|
||
/* -x foo: execute commands from foo. */
|
||
else if (!strcmp (arg, "-x") || !strcmp (arg, "-command")
|
||
|| !strcmp (arg, "-commands"))
|
||
source_command (argv[i]);
|
||
/* -d foo: add directory `foo' to source-file directory
|
||
search-list */
|
||
else if (!strcmp (arg, "-d") || !strcmp (arg, "-dir")
|
||
|| !strcmp (arg, "-directory"))
|
||
directory_command (argv[i], 0);
|
||
/* -cd FOO: specify current directory as FOO.
|
||
GDB remembers the precise string FOO as the dirname. */
|
||
else if (!strcmp (arg, "-cd"))
|
||
{
|
||
cd_command (argv[i], 0);
|
||
init_source_path ();
|
||
}
|
||
/* -t /def/ttyp1: use /dev/ttyp1 for inferior I/O. */
|
||
else if (!strcmp (arg, "-t") || !strcmp (arg, "-tty"))
|
||
tty_command (argv[i], 0);
|
||
|
||
/* -help: print a summary of command line switches. */
|
||
else if (!strcmp (arg, "-help"))
|
||
{
|
||
fputs ("\
|
||
This is GDB, the GNU debugger. Use the command\n\
|
||
gdb [options] [executable [core-file]]\n\
|
||
to enter the debugger.\n\
|
||
\n\
|
||
Options available are:\n\
|
||
-help Print this message.\n\
|
||
-quiet Do not print version number on startup.\n\
|
||
-fullname Output information used by emacs-GDB interface.\n\
|
||
-batch Exit after processing options.\n\
|
||
-nx Do not read .gdbinit file.\n\
|
||
-tty TTY Use TTY for input/output by the program being debugged.\n\
|
||
-cd DIR Change current directory to DIR.\n\
|
||
-directory DIR Search for source files in DIR.\n\
|
||
-command FILE Execute GDB commands from FILE.\n\
|
||
-symbols SYMFILE Read symbols from SYMFILE.\n\
|
||
-exec EXECFILE Use EXECFILE as the executable.\n\
|
||
-se FILE Use FILE as symbol file and executable file.\n\
|
||
-core COREFILE Analyze the core dump COREFILE.\n\
|
||
\n\
|
||
For more information, type \"help\" from within GDB, or consult the\n\
|
||
GDB manual (available as on-line info or a printed manual).\n", stderr);
|
||
/* Exiting after printing this message seems like
|
||
the most useful thing to do. */
|
||
exit (0);
|
||
}
|
||
else
|
||
error ("Unknown command-line switch: \"%s\"\n", arg);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Args not thus accounted for
|
||
are treated as, first, the symbol/executable file
|
||
and, second, the core dump file. */
|
||
count++;
|
||
if (!setjmp (to_top_level))
|
||
switch (count)
|
||
{
|
||
case 1:
|
||
exec_file_command (arg, !batch);
|
||
symbol_file_command (arg, !batch);
|
||
break;
|
||
|
||
case 2:
|
||
core_file_command (arg, !batch);
|
||
break;
|
||
|
||
case 3:
|
||
fprintf (stderr, "Excess command line args ignored. (%s%s)\n",
|
||
arg, (i == argc - 1) ? "" : " ...");
|
||
}
|
||
}
|
||
}
|
||
|
||
{
|
||
struct stat homebuf, cwdbuf;
|
||
char *homedir, *homeinit;
|
||
|
||
/* Read init file, if it exists in home directory */
|
||
homedir = getenv ("HOME");
|
||
if (homedir)
|
||
{
|
||
homeinit = (char *) alloca (strlen (getenv ("HOME")) + 10);
|
||
strcpy (homeinit, getenv ("HOME"));
|
||
strcat (homeinit, "/.gdbinit");
|
||
if (!inhibit_gdbinit && access (homeinit, R_OK) == 0)
|
||
if (!setjmp (to_top_level))
|
||
source_command (homeinit);
|
||
|
||
/* Do stats; no need to do them elsewhere since we'll only
|
||
need them if homedir is set. Make sure that they are
|
||
zero in case one of them fails (guarantees that they
|
||
won't match if either exits). */
|
||
|
||
bzero (&homebuf, sizeof (struct stat));
|
||
bzero (&cwdbuf, sizeof (struct stat));
|
||
|
||
stat (homeinit, &homebuf);
|
||
stat ("./.gdbinit", &cwdbuf); /* We'll only need this if
|
||
homedir was set. */
|
||
}
|
||
|
||
/* Read the input file in the current directory, *if* it isn't
|
||
the same file (it should exist, also). */
|
||
|
||
if (!homedir
|
||
|| bcmp ((char *) &homebuf,
|
||
(char *) &cwdbuf,
|
||
sizeof (struct stat)))
|
||
if (!inhibit_gdbinit && access (".gdbinit", R_OK) == 0)
|
||
if (!setjmp (to_top_level))
|
||
source_command (".gdbinit");
|
||
}
|
||
|
||
if (batch)
|
||
{
|
||
#if 0
|
||
fatal ("Attempt to read commands from stdin in batch mode.");
|
||
#endif
|
||
/* We have hit the end of the batch file. */
|
||
exit (0);
|
||
}
|
||
|
||
if (!quiet)
|
||
printf ("Type \"help\" for a list of commands.\n");
|
||
|
||
/* The command loop. */
|
||
|
||
while (1)
|
||
{
|
||
if (!setjmp (to_top_level))
|
||
command_loop ();
|
||
clearerr (stdin); /* Don't get hung if C-d is typed. */
|
||
}
|
||
}
|
||
|
||
/* Execute the line P as a command.
|
||
Pass FROM_TTY as second argument to the defining function. */
|
||
|
||
void
|
||
execute_command (p, from_tty)
|
||
char *p;
|
||
int from_tty;
|
||
{
|
||
register struct cmd_list_element *c;
|
||
register struct command_line *cmdlines;
|
||
|
||
free_all_values ();
|
||
while (*p == ' ' || *p == '\t') p++;
|
||
if (*p)
|
||
{
|
||
c = lookup_cmd (&p, cmdlist, "", 0, 1);
|
||
if (c->function == 0)
|
||
error ("That is not a command, just a help topic.");
|
||
else if (c->class == (int) class_user)
|
||
{
|
||
struct cleanup *old_chain;
|
||
|
||
if (*p)
|
||
error ("User-defined commands cannot take arguments.");
|
||
cmdlines = (struct command_line *) c->function;
|
||
if (cmdlines == (struct command_line *) 0)
|
||
/* Null command */
|
||
return;
|
||
|
||
/* Set the instream to 0, indicating execution of a
|
||
user-defined function. */
|
||
old_chain = make_cleanup (source_cleanup, instream);
|
||
instream = (FILE *) 0;
|
||
while (cmdlines)
|
||
{
|
||
execute_command (cmdlines->line, 0);
|
||
cmdlines = cmdlines->next;
|
||
}
|
||
do_cleanups (old_chain);
|
||
}
|
||
else
|
||
/* Pass null arg rather than an empty one. */
|
||
(*c->function) (*p ? p : 0, from_tty);
|
||
}
|
||
}
|
||
|
||
static void
|
||
do_nothing ()
|
||
{
|
||
}
|
||
|
||
/* Read commands from `instream' and execute them
|
||
until end of file. */
|
||
void
|
||
command_loop ()
|
||
{
|
||
struct cleanup *old_chain;
|
||
while (!feof (instream))
|
||
{
|
||
if (window_hook && instream == stdin)
|
||
(*window_hook) (instream, prompt);
|
||
|
||
quit_flag = 0;
|
||
if (instream == stdin && ISATTY (stdin))
|
||
reinitialize_more_filter ();
|
||
old_chain = make_cleanup (do_nothing, 0);
|
||
execute_command (command_line_input (instream == stdin ? prompt : 0,
|
||
instream == stdin),
|
||
instream == stdin);
|
||
/* Do any commands attached to breakpoint we stopped at. */
|
||
do_breakpoint_commands ();
|
||
do_cleanups (old_chain);
|
||
}
|
||
}
|
||
|
||
/* Commands call this if they do not want to be repeated by null lines. */
|
||
|
||
void
|
||
dont_repeat ()
|
||
{
|
||
/* If we aren't reading from standard input, we are saving the last
|
||
thing read from stdin in line and don't want to delete it. Null lines
|
||
won't repeat here in any case. */
|
||
if (instream == stdin)
|
||
*line = 0;
|
||
}
|
||
|
||
/* Read a line from the stream "instream" without command line editing.
|
||
|
||
It prints PROMPT once at the start.
|
||
|
||
If RETURN_RESULT is set it allocates
|
||
space for whatever the user types and returns the result.
|
||
If not, it just discards what the user types. */
|
||
char *
|
||
gdb_readline (prompt, return_result)
|
||
char *prompt;
|
||
int return_result;
|
||
{
|
||
int c;
|
||
char *result;
|
||
int input_index = 0;
|
||
int result_size = 80;
|
||
|
||
if (prompt)
|
||
{
|
||
printf (prompt);
|
||
fflush (stdout);
|
||
}
|
||
|
||
if (return_result)
|
||
result = (char *) xmalloc (result_size);
|
||
|
||
while (1)
|
||
{
|
||
c = fgetc (instream);
|
||
if (c == -1 || c == '\n')
|
||
break;
|
||
if (return_result)
|
||
{
|
||
result[input_index++] = c;
|
||
while (input_index >= result_size)
|
||
{
|
||
result_size *= 2;
|
||
result = (char *) xrealloc (result, result_size);
|
||
}
|
||
}
|
||
}
|
||
if (return_result)
|
||
{
|
||
result[input_index++] = '\0';
|
||
return result;
|
||
}
|
||
else
|
||
return (char *) 0;
|
||
}
|
||
|
||
/* Declaration for fancy readline with command line editing. */
|
||
char *readline ();
|
||
|
||
/* Variables which control command line editing and history
|
||
substitution. These variables are given default values at the end
|
||
of this file. */
|
||
static int command_editing_p;
|
||
static int history_expansion_p;
|
||
static int write_history_p;
|
||
static int history_size;
|
||
static char *history_filename;
|
||
|
||
/* Variables which are necessary for fancy command line editing. */
|
||
char *gdb_completer_word_break_characters =
|
||
" \t\n!@#$%^&*()-+=|~`}{[]\"';:?/>.<,";
|
||
|
||
/* Functions that are used as part of the fancy command line editing. */
|
||
|
||
/* Generate symbol names one by one for the completer. If STATE is
|
||
zero, then we need to initialize, otherwise the initialization has
|
||
already taken place. TEXT is what we expect the symbol to start
|
||
with. RL_LINE_BUFFER is available to be looked at; it contains the
|
||
entire text of the line. RL_POINT is the offset in that line of
|
||
the cursor. You should pretend that the line ends at RL_POINT. */
|
||
char *
|
||
symbol_completion_function (text, state)
|
||
char *text;
|
||
int state;
|
||
{
|
||
char **make_symbol_completion_list ();
|
||
static char **list = (char **)NULL;
|
||
static int index;
|
||
char *output;
|
||
extern char *rl_line_buffer;
|
||
extern int rl_point;
|
||
char *tmp_command, *p;
|
||
struct cmd_list_element *c, *result_list;
|
||
|
||
if (!state)
|
||
{
|
||
/* Free the storage used by LIST, but not by the strings inside. This is
|
||
because rl_complete_internal () frees the strings. */
|
||
if (list)
|
||
free (list);
|
||
list = 0;
|
||
index = 0;
|
||
|
||
/* Decide whether to complete on a list of gdb commands or on
|
||
symbols. */
|
||
tmp_command = (char *) alloca (rl_point + 1);
|
||
p = tmp_command;
|
||
|
||
strncpy (tmp_command, rl_line_buffer, rl_point);
|
||
tmp_command[rl_point] = '\0';
|
||
|
||
if (rl_point == 0)
|
||
{
|
||
/* An empty line we want to consider ambiguous; that is,
|
||
it could be any command. */
|
||
c = (struct cmd_list_element *) -1;
|
||
result_list = 0;
|
||
}
|
||
else
|
||
c = lookup_cmd_1 (&p, cmdlist, &result_list, 1);
|
||
|
||
/* Move p up to the next interesting thing. */
|
||
while (*p == ' ' || *p == '\t')
|
||
p++;
|
||
|
||
if (!c)
|
||
/* He's typed something unrecognizable. Sigh. */
|
||
list = (char **) 0;
|
||
else if (c == (struct cmd_list_element *) -1)
|
||
{
|
||
if (p + strlen(text) != tmp_command + rl_point)
|
||
error ("Unrecognized command.");
|
||
|
||
/* He's typed something ambiguous. This is easier. */
|
||
if (result_list)
|
||
list = complete_on_cmdlist (*result_list->prefixlist, text);
|
||
else
|
||
list = complete_on_cmdlist (cmdlist, text);
|
||
}
|
||
else
|
||
{
|
||
/* If we've gotten this far, gdb has recognized a full
|
||
command. There are several possibilities:
|
||
|
||
1) We need to complete on the command.
|
||
2) We need to complete on the possibilities coming after
|
||
the command.
|
||
2) We need to complete the text of what comes after the
|
||
command. */
|
||
|
||
if (!*p && *text)
|
||
/* Always (might be longer versions of thie command). */
|
||
list = complete_on_cmdlist (result_list, text);
|
||
else if (!*p && !*text)
|
||
{
|
||
if (c->prefixlist)
|
||
list = complete_on_cmdlist (*c->prefixlist, "");
|
||
else
|
||
list = make_symbol_completion_list ("");
|
||
}
|
||
else
|
||
{
|
||
if (c->prefixlist && !c->allow_unknown)
|
||
{
|
||
*p = '\0';
|
||
error ("\"%s\" command requires a subcommand.",
|
||
tmp_command);
|
||
}
|
||
else
|
||
list = make_symbol_completion_list (text);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* If the debugged program wasn't compiled with symbols, or if we're
|
||
clearly completing on a command and no command matches, return
|
||
NULL. */
|
||
if (!list)
|
||
return ((char *)NULL);
|
||
|
||
output = list[index];
|
||
if (output)
|
||
index++;
|
||
|
||
return (output);
|
||
}
|
||
|
||
#ifdef STOP_SIGNAL
|
||
static void
|
||
stop_sig ()
|
||
{
|
||
#if STOP_SIGNAL == SIGTSTP
|
||
signal (SIGTSTP, SIG_DFL);
|
||
sigsetmask (0);
|
||
kill (getpid (), SIGTSTP);
|
||
signal (SIGTSTP, stop_sig);
|
||
#else
|
||
signal (STOP_SIGNAL, stop_sig);
|
||
#endif
|
||
printf ("%s", prompt);
|
||
fflush (stdout);
|
||
|
||
/* Forget about any previous command -- null line now will do nothing. */
|
||
dont_repeat ();
|
||
}
|
||
#endif /* STOP_SIGNAL */
|
||
|
||
#if 0
|
||
Writing the history file upon a terminating signal is not useful,
|
||
because the info is rarely relevant and is in the core dump anyway.
|
||
It is an annoyance to have the file cluttering up the place.
|
||
/* The list of signals that would terminate us if not caught.
|
||
We catch them, but just so that we can write the history file,
|
||
and so forth. */
|
||
int terminating_signals[] = {
|
||
SIGHUP, SIGINT, SIGILL, SIGTRAP, SIGIOT,
|
||
SIGEMT, SIGFPE, SIGKILL, SIGBUS, SIGSEGV, SIGSYS,
|
||
SIGPIPE, SIGALRM, SIGTERM,
|
||
#ifdef SIGXCPU
|
||
SIGXCPU,
|
||
#endif
|
||
#ifdef SIGXFSZ
|
||
SIGXFSZ,
|
||
#endif
|
||
#ifdef SIGVTALRM
|
||
SIGVTALRM,
|
||
#endif
|
||
#ifdef SIGPROF
|
||
SIGPROF,
|
||
#endif
|
||
#ifdef SIGLOST
|
||
SIGLOST,
|
||
#endif
|
||
#ifdef SIGUSR1
|
||
SIGUSR1, SIGUSR2
|
||
#endif
|
||
};
|
||
|
||
#define TERMSIGS_LENGTH (sizeof (terminating_signals) / sizeof (int))
|
||
|
||
static void
|
||
catch_termination (sig)
|
||
int sig;
|
||
{
|
||
/* We are probably here because GDB has a bug. Write out the history
|
||
so that we might have a better chance of reproducing it. */
|
||
/* Tell the user what we are doing so he can delete the file if
|
||
it is unwanted. */
|
||
write_history (history_filename);
|
||
printf ("\n%s written.\n", history_filename);
|
||
signal (sig, SIG_DFL);
|
||
kill (getpid (), sig);
|
||
}
|
||
#endif
|
||
|
||
/* Initialize signal handlers. */
|
||
initialize_signals ()
|
||
{
|
||
extern void request_quit ();
|
||
#if 0
|
||
register int i;
|
||
|
||
for (i = 0; i < TERMSIGS_LENGTH; i++)
|
||
signal (terminating_signals[i], catch_termination);
|
||
#endif
|
||
|
||
signal (SIGINT, request_quit);
|
||
|
||
/* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
|
||
passed to the inferior, which we don't want. It would be
|
||
possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
|
||
on BSD4.3 systems using vfork, that will (apparently) affect the
|
||
GDB process as well as the inferior (the signal handling tables
|
||
being shared between the two, apparently). Since we establish
|
||
a handler for SIGQUIT, when we call exec it will set the signal
|
||
to SIG_DFL for us. */
|
||
signal (SIGQUIT, do_nothing);
|
||
if (signal (SIGHUP, do_nothing) != SIG_IGN)
|
||
signal (SIGHUP, disconnect);
|
||
signal (SIGFPE, float_handler);
|
||
}
|
||
|
||
/* Read one line from the command input stream `instream'
|
||
into the local static buffer `linebuffer' (whose current length
|
||
is `linelength').
|
||
The buffer is made bigger as necessary.
|
||
Returns the address of the start of the line.
|
||
|
||
*If* the instream == stdin & stdin is a terminal, the line read
|
||
is copied into the file line saver (global var char *line,
|
||
length linesize) so that it can be duplicated.
|
||
|
||
This routine either uses fancy command line editing or
|
||
simple input as the user has requested. */
|
||
|
||
char *
|
||
command_line_input (prompt, repeat)
|
||
char *prompt;
|
||
int repeat;
|
||
{
|
||
static char *linebuffer = 0;
|
||
static int linelength = 0;
|
||
register char *p;
|
||
register char *p1, *rl;
|
||
char *local_prompt = prompt;
|
||
register int c;
|
||
char *nline;
|
||
|
||
if (linebuffer == 0)
|
||
{
|
||
linelength = 80;
|
||
linebuffer = (char *) xmalloc (linelength);
|
||
}
|
||
|
||
p = linebuffer;
|
||
|
||
/* Control-C quits instantly if typed while in this loop
|
||
since it should not wait until the user types a newline. */
|
||
immediate_quit++;
|
||
#ifdef STOP_SIGNAL
|
||
signal (STOP_SIGNAL, stop_sig);
|
||
#endif
|
||
|
||
while (1)
|
||
{
|
||
/* Don't use fancy stuff if not talking to stdin. */
|
||
if (command_editing_p && instream == stdin
|
||
&& ISATTY (instream))
|
||
rl = readline (local_prompt);
|
||
else
|
||
rl = gdb_readline (local_prompt, 1);
|
||
|
||
if (!rl || rl == (char *) EOF) break;
|
||
if (strlen(rl) + 1 + (p - linebuffer) > linelength)
|
||
{
|
||
linelength = strlen(rl) + 1 + (p - linebuffer);
|
||
nline = (char *) xrealloc (linebuffer, linelength);
|
||
p += nline - linebuffer;
|
||
linebuffer = nline;
|
||
}
|
||
p1 = rl;
|
||
/* Copy line. Don't copy null at end. (Leaves line alone
|
||
if this was just a newline) */
|
||
while (*p1)
|
||
*p++ = *p1++;
|
||
|
||
free (rl); /* Allocated in readline. */
|
||
|
||
if (p == linebuffer || *(p - 1) != '\\')
|
||
break;
|
||
|
||
p--; /* Put on top of '\'. */
|
||
local_prompt = (char *) 0;
|
||
}
|
||
|
||
#ifdef STOP_SIGNAL
|
||
signal (SIGTSTP, SIG_DFL);
|
||
#endif
|
||
immediate_quit--;
|
||
|
||
/* Do history expansion if that is wished. */
|
||
if (history_expansion_p && instream == stdin
|
||
&& ISATTY (instream))
|
||
{
|
||
char *history_value;
|
||
int expanded;
|
||
|
||
*p = '\0'; /* Insert null now. */
|
||
expanded = history_expand (linebuffer, &history_value);
|
||
if (expanded)
|
||
{
|
||
/* Print the changes. */
|
||
printf ("%s\n", history_value);
|
||
|
||
/* If there was an error, call this function again. */
|
||
if (expanded < 0)
|
||
{
|
||
free (history_value);
|
||
return command_line_input (prompt, repeat);
|
||
}
|
||
if (strlen (history_value) > linelength)
|
||
{
|
||
linelength = strlen (history_value) + 1;
|
||
linebuffer = (char *) xrealloc (linebuffer, linelength);
|
||
}
|
||
strcpy (linebuffer, history_value);
|
||
p = linebuffer + strlen(linebuffer);
|
||
free (history_value);
|
||
}
|
||
}
|
||
|
||
/* If we just got an empty line, and that is supposed
|
||
to repeat the previous command, return the value in the
|
||
global buffer. */
|
||
if (repeat)
|
||
{
|
||
if (p == linebuffer)
|
||
return line;
|
||
p1 = linebuffer;
|
||
while (*p1 == ' ' || *p1 == '\t')
|
||
p1++;
|
||
if (!*p1)
|
||
return line;
|
||
}
|
||
|
||
*p = 0;
|
||
|
||
/* Add line to history if appropriate. */
|
||
if (instream == stdin
|
||
&& ISATTY (stdin) && *linebuffer)
|
||
add_history (linebuffer);
|
||
|
||
/* If line is a comment, clear it out. */
|
||
/* Note: comments are added to the command history.
|
||
This is useful when you type a command, and then realize
|
||
you don't want to execute it quite yet. You can comment out the
|
||
command and then later fetch it from the value history and
|
||
remove the '#'. */
|
||
p1 = linebuffer;
|
||
while ((c = *p1) == ' ' || c == '\t') p1++;
|
||
if (c == '#')
|
||
*linebuffer = 0;
|
||
|
||
/* Save into global buffer if appropriate. */
|
||
if (repeat)
|
||
{
|
||
if (linelength > linesize)
|
||
{
|
||
line = xrealloc (line, linelength);
|
||
linesize = linelength;
|
||
}
|
||
strcpy (line, linebuffer);
|
||
return line;
|
||
}
|
||
|
||
return linebuffer;
|
||
}
|
||
|
||
/* Read lines from the input stream
|
||
and accumulate them in a chain of struct command_line's
|
||
which is then returned. */
|
||
|
||
struct command_line *
|
||
read_command_lines ()
|
||
{
|
||
struct command_line *first = 0;
|
||
register struct command_line *next, *tail = 0;
|
||
register char *p, *p1;
|
||
struct cleanup *old_chain = 0;
|
||
|
||
while (1)
|
||
{
|
||
dont_repeat ();
|
||
p = command_line_input (0, instream == stdin);
|
||
/* Remove leading and trailing blanks. */
|
||
while (*p == ' ' || *p == '\t') p++;
|
||
p1 = p + strlen (p);
|
||
while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t')) p1--;
|
||
|
||
/* Is this "end"? */
|
||
if (p1 - p == 3 && !strncmp (p, "end", 3))
|
||
break;
|
||
|
||
/* No => add this line to the chain of command lines. */
|
||
next = (struct command_line *) xmalloc (sizeof (struct command_line));
|
||
next->line = savestring (p, p1 - p);
|
||
next->next = 0;
|
||
if (tail)
|
||
{
|
||
tail->next = next;
|
||
}
|
||
else
|
||
{
|
||
/* We just read the first line.
|
||
From now on, arrange to throw away the lines we have
|
||
if we quit or get an error while inside this function. */
|
||
first = next;
|
||
old_chain = make_cleanup (free_command_lines, &first);
|
||
}
|
||
tail = next;
|
||
}
|
||
|
||
dont_repeat ();
|
||
|
||
/* Now we are about to return the chain to our caller,
|
||
so freeing it becomes his responsibility. */
|
||
if (first)
|
||
discard_cleanups (old_chain);
|
||
return first;
|
||
}
|
||
|
||
/* Free a chain of struct command_line's. */
|
||
|
||
void
|
||
free_command_lines (lptr)
|
||
struct command_line **lptr;
|
||
{
|
||
register struct command_line *l = *lptr;
|
||
register struct command_line *next;
|
||
|
||
while (l)
|
||
{
|
||
next = l->next;
|
||
free (l->line);
|
||
free (l);
|
||
l = next;
|
||
}
|
||
}
|
||
|
||
/* Add an element to the list of info subcommands. */
|
||
|
||
void
|
||
add_info (name, fun, doc)
|
||
char *name;
|
||
void (*fun) ();
|
||
char *doc;
|
||
{
|
||
add_cmd (name, no_class, fun, doc, &infolist);
|
||
}
|
||
|
||
/* Add an alias to the list of info subcommands. */
|
||
|
||
void
|
||
add_info_alias (name, oldname, abbrev_flag)
|
||
char *name;
|
||
char *oldname;
|
||
int abbrev_flag;
|
||
{
|
||
add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist);
|
||
}
|
||
|
||
/* The "info" command is defined as a prefix, with allow_unknown = 0.
|
||
Therefore, its own definition is called only for "info" with no args. */
|
||
|
||
static void
|
||
info_command ()
|
||
{
|
||
printf ("\"info\" must be followed by the name of an info command.\n");
|
||
help_list (infolist, "info ", -1, stdout);
|
||
}
|
||
|
||
/* Add an element to the list of commands. */
|
||
|
||
void
|
||
add_com (name, class, fun, doc)
|
||
char *name;
|
||
int class;
|
||
void (*fun) ();
|
||
char *doc;
|
||
{
|
||
add_cmd (name, class, fun, doc, &cmdlist);
|
||
}
|
||
|
||
/* Add an alias or abbreviation command to the list of commands. */
|
||
|
||
void
|
||
add_com_alias (name, oldname, class, abbrev_flag)
|
||
char *name;
|
||
char *oldname;
|
||
int class;
|
||
int abbrev_flag;
|
||
{
|
||
add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist);
|
||
}
|
||
|
||
void
|
||
error_no_arg (why)
|
||
char *why;
|
||
{
|
||
error ("Argument required (%s).", why);
|
||
}
|
||
|
||
static void
|
||
help_command (command, from_tty)
|
||
char *command;
|
||
int from_tty; /* Ignored */
|
||
{
|
||
help_cmd (command, stdout);
|
||
}
|
||
|
||
static void
|
||
validate_comname (comname)
|
||
char *comname;
|
||
{
|
||
register char *p;
|
||
|
||
if (comname == 0)
|
||
error_no_arg ("name of command to define");
|
||
|
||
p = comname;
|
||
while (*p)
|
||
{
|
||
if (!(*p >= 'A' && *p <= 'Z')
|
||
&& !(*p >= 'a' && *p <= 'z')
|
||
&& !(*p >= '0' && *p <= '9')
|
||
&& *p != '-')
|
||
error ("Junk in argument list: \"%s\"", p);
|
||
p++;
|
||
}
|
||
}
|
||
|
||
static void
|
||
define_command (comname, from_tty)
|
||
char *comname;
|
||
int from_tty;
|
||
{
|
||
register struct command_line *cmds;
|
||
register struct cmd_list_element *c;
|
||
char *tem = comname;
|
||
|
||
validate_comname (comname);
|
||
|
||
c = lookup_cmd (&tem, cmdlist, "", -1, 1);
|
||
if (c)
|
||
{
|
||
if (c->class == (int) class_user || c->class == (int) class_alias)
|
||
tem = "Redefine command \"%s\"? ";
|
||
else
|
||
tem = "Really redefine built-in command \"%s\"? ";
|
||
if (!query (tem, comname))
|
||
error ("Command \"%s\" not redefined.", comname);
|
||
}
|
||
|
||
if (from_tty)
|
||
{
|
||
printf ("Type commands for definition of \"%s\".\n\
|
||
End with a line saying just \"end\".\n", comname);
|
||
fflush (stdout);
|
||
}
|
||
comname = savestring (comname, strlen (comname));
|
||
|
||
cmds = read_command_lines ();
|
||
|
||
if (c && c->class == (int) class_user)
|
||
free_command_lines (&c->function);
|
||
|
||
add_com (comname, class_user, cmds,
|
||
(c && c->class == (int) class_user)
|
||
? c->doc : savestring ("User-defined.", 13));
|
||
}
|
||
|
||
static void
|
||
document_command (comname, from_tty)
|
||
char *comname;
|
||
int from_tty;
|
||
{
|
||
struct command_line *doclines;
|
||
register struct cmd_list_element *c;
|
||
char *tem = comname;
|
||
|
||
validate_comname (comname);
|
||
|
||
c = lookup_cmd (&tem, cmdlist, "", 0, 1);
|
||
|
||
if (c->class != (int) class_user)
|
||
error ("Command \"%s\" is built-in.", comname);
|
||
|
||
if (from_tty)
|
||
printf ("Type documentation for \"%s\".\n\
|
||
End with a line saying just \"end\".\n", comname);
|
||
|
||
doclines = read_command_lines ();
|
||
|
||
if (c->doc) free (c->doc);
|
||
|
||
{
|
||
register struct command_line *cl1;
|
||
register int len = 0;
|
||
|
||
for (cl1 = doclines; cl1; cl1 = cl1->next)
|
||
len += strlen (cl1->line) + 1;
|
||
|
||
c->doc = (char *) xmalloc (len + 1);
|
||
*c->doc = 0;
|
||
|
||
for (cl1 = doclines; cl1; cl1 = cl1->next)
|
||
{
|
||
strcat (c->doc, cl1->line);
|
||
if (cl1->next)
|
||
strcat (c->doc, "\n");
|
||
}
|
||
}
|
||
|
||
free_command_lines (&doclines);
|
||
}
|
||
|
||
static void
|
||
print_gdb_version ()
|
||
{
|
||
printf ("GDB %s, Copyright (C) 1989 Free Software Foundation, Inc.\n\
|
||
There is ABSOLUTELY NO WARRANTY for GDB; type \"info warranty\" for details.\n\
|
||
GDB is free software and you are welcome to distribute copies of it\n\
|
||
under certain conditions; type \"info copying\" to see the conditions.\n",
|
||
version);
|
||
}
|
||
|
||
static void
|
||
version_info ()
|
||
{
|
||
immediate_quit++;
|
||
print_gdb_version ();
|
||
immediate_quit--;
|
||
}
|
||
|
||
/* xgdb calls this to reprint the usual GDB prompt. */
|
||
|
||
void
|
||
print_prompt ()
|
||
{
|
||
printf ("%s", prompt);
|
||
fflush (stdout);
|
||
}
|
||
|
||
/* Command to specify a prompt string instead of "(gdb) ". */
|
||
|
||
static void
|
||
set_prompt_command (text)
|
||
char *text;
|
||
{
|
||
char *p, *q;
|
||
register int c;
|
||
char *new;
|
||
|
||
if (text == 0)
|
||
error_no_arg ("string to which to set prompt");
|
||
|
||
new = (char *) xmalloc (strlen (text) + 2);
|
||
p = text; q = new;
|
||
while (c = *p++)
|
||
{
|
||
if (c == '\\')
|
||
{
|
||
/* \ at end of argument is used after spaces
|
||
so they won't be lost. */
|
||
if (*p == 0)
|
||
break;
|
||
c = parse_escape (&p);
|
||
if (c == 0)
|
||
break; /* C loses */
|
||
else if (c > 0)
|
||
*q++ = c;
|
||
}
|
||
else
|
||
*q++ = c;
|
||
}
|
||
if (*(p - 1) != '\\')
|
||
*q++ = ' ';
|
||
*q++ = '\0';
|
||
new = (char *) xrealloc (new, q - new);
|
||
free (prompt);
|
||
prompt = new;
|
||
}
|
||
|
||
static void
|
||
quit_command ()
|
||
{
|
||
if (have_inferior_p ())
|
||
{
|
||
if (query ("The program is running. Quit anyway? "))
|
||
{
|
||
/* Prevent any warning message from reopen_exec_file, in case
|
||
we have a core file that's inconsistent with the exec file. */
|
||
exec_file_command (0, 0);
|
||
kill_inferior ();
|
||
}
|
||
else
|
||
error ("Not confirmed.");
|
||
}
|
||
/* Save the history information if it is appropriate to do so. */
|
||
if (write_history_p && history_filename)
|
||
write_history (history_filename);
|
||
exit (0);
|
||
}
|
||
|
||
int
|
||
input_from_terminal_p ()
|
||
{
|
||
return instream == stdin;
|
||
}
|
||
|
||
static void
|
||
pwd_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
if (arg) error ("The \"pwd\" command does not take an argument: %s", arg);
|
||
getwd (dirbuf);
|
||
|
||
if (strcmp (dirbuf, current_directory))
|
||
printf ("Working directory %s\n (canonically %s).\n",
|
||
current_directory, dirbuf);
|
||
else
|
||
printf ("Working directory %s.\n", current_directory);
|
||
}
|
||
|
||
static void
|
||
cd_command (dir, from_tty)
|
||
char *dir;
|
||
int from_tty;
|
||
{
|
||
int len;
|
||
int change;
|
||
|
||
if (dir == 0)
|
||
error_no_arg ("new working directory");
|
||
|
||
dir = tilde_expand (dir);
|
||
make_cleanup (free, dir);
|
||
|
||
len = strlen (dir);
|
||
dir = savestring (dir, len - (len > 1 && dir[len-1] == '/'));
|
||
if (dir[0] == '/')
|
||
current_directory = dir;
|
||
else
|
||
{
|
||
current_directory = concat (current_directory, "/", dir);
|
||
free (dir);
|
||
}
|
||
|
||
/* Now simplify any occurrences of `.' and `..' in the pathname. */
|
||
|
||
change = 1;
|
||
while (change)
|
||
{
|
||
char *p;
|
||
change = 0;
|
||
|
||
for (p = current_directory; *p;)
|
||
{
|
||
if (!strncmp (p, "/./", 2)
|
||
&& (p[2] == 0 || p[2] == '/'))
|
||
strcpy (p, p + 2);
|
||
else if (!strncmp (p, "/..", 3)
|
||
&& (p[3] == 0 || p[3] == '/')
|
||
&& p != current_directory)
|
||
{
|
||
char *q = p;
|
||
while (q != current_directory && q[-1] != '/') q--;
|
||
if (q != current_directory)
|
||
{
|
||
strcpy (q-1, p+3);
|
||
p = q-1;
|
||
}
|
||
}
|
||
else p++;
|
||
}
|
||
}
|
||
|
||
if (chdir (dir) < 0)
|
||
perror_with_name (dir);
|
||
|
||
if (from_tty)
|
||
pwd_command ((char *) 0, 1);
|
||
}
|
||
|
||
static void
|
||
source_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
FILE *stream;
|
||
struct cleanup *cleanups;
|
||
char *file = arg;
|
||
|
||
if (file == 0)
|
||
/* Let source without arguments read .gdbinit. */
|
||
file = ".gdbinit";
|
||
|
||
file = tilde_expand (file);
|
||
make_cleanup (free, file);
|
||
|
||
stream = fopen (file, "r");
|
||
if (stream == 0)
|
||
perror_with_name (file);
|
||
|
||
cleanups = make_cleanup (source_cleanup, instream);
|
||
|
||
instream = stream;
|
||
|
||
command_loop ();
|
||
|
||
do_cleanups (cleanups);
|
||
}
|
||
|
||
static void
|
||
echo_command (text)
|
||
char *text;
|
||
{
|
||
char *p = text;
|
||
register int c;
|
||
|
||
if (text)
|
||
while (c = *p++)
|
||
{
|
||
if (c == '\\')
|
||
{
|
||
/* \ at end of argument is used after spaces
|
||
so they won't be lost. */
|
||
if (*p == 0)
|
||
return;
|
||
|
||
c = parse_escape (&p);
|
||
if (c >= 0)
|
||
fputc (c, stdout);
|
||
}
|
||
else
|
||
fputc (c, stdout);
|
||
}
|
||
}
|
||
|
||
static void
|
||
dump_me_command ()
|
||
{
|
||
if (query ("Should GDB dump core? "))
|
||
{
|
||
signal (SIGQUIT, SIG_DFL);
|
||
kill (getpid (), SIGQUIT);
|
||
}
|
||
}
|
||
|
||
int
|
||
parse_binary_operation (caller, arg)
|
||
char *caller, *arg;
|
||
{
|
||
int length;
|
||
|
||
if (!arg || !*arg)
|
||
return 1;
|
||
|
||
length = strlen (arg);
|
||
|
||
while (arg[length - 1] == ' ' || arg[length - 1] == '\t')
|
||
length--;
|
||
|
||
if (!strncmp (arg, "on", length)
|
||
|| !strncmp (arg, "1", length)
|
||
|| !strncmp (arg, "yes", length))
|
||
return 1;
|
||
else
|
||
if (!strncmp (arg, "off", length)
|
||
|| !strncmp (arg, "0", length)
|
||
|| !strncmp (arg, "no", length))
|
||
return 0;
|
||
else
|
||
error ("\"%s\" not given a binary valued argument.", caller);
|
||
}
|
||
|
||
/* Functions to manipulate command line editing control variables. */
|
||
|
||
static void
|
||
set_editing (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
command_editing_p = parse_binary_operation ("set command-editing", arg);
|
||
}
|
||
|
||
/* Number of commands to print in each call to editing_info. */
|
||
#define Hist_print 10
|
||
static void
|
||
editing_info (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
/* Index for history commands. Relative to history_base. */
|
||
int offset;
|
||
|
||
/* Number of the history entry which we are planning to display next.
|
||
Relative to history_base. */
|
||
static int num = 0;
|
||
|
||
/* The first command in the history which doesn't exist (i.e. one more
|
||
than the number of the last command). Relative to history_base. */
|
||
int hist_len;
|
||
|
||
struct _hist_entry {
|
||
char *line;
|
||
char *data;
|
||
} *history_get();
|
||
extern int history_base;
|
||
|
||
printf_filtered ("Interactive command editing is %s.\n",
|
||
command_editing_p ? "on" : "off");
|
||
|
||
printf_filtered ("History expansion of command input is %s.\n",
|
||
history_expansion_p ? "on" : "off");
|
||
printf_filtered ("Writing of a history record upon exit is %s.\n",
|
||
write_history_p ? "enabled" : "disabled");
|
||
printf_filtered ("The size of the history list (number of stored commands) is %d.\n",
|
||
history_size);
|
||
printf_filtered ("The name of the history record is \"%s\".\n\n",
|
||
history_filename ? history_filename : "");
|
||
|
||
/* Print out some of the commands from the command history. */
|
||
/* First determine the length of the history list. */
|
||
hist_len = history_size;
|
||
for (offset = 0; offset < history_size; offset++)
|
||
{
|
||
if (!history_get (history_base + offset))
|
||
{
|
||
hist_len = offset;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (arg)
|
||
{
|
||
if (arg[0] == '+' && arg[1] == '\0')
|
||
/* "info editing +" should print from the stored position. */
|
||
;
|
||
else
|
||
/* "info editing <exp>" should print around command number <exp>. */
|
||
num = (parse_and_eval_address (arg) - history_base) - Hist_print / 2;
|
||
}
|
||
/* "info editing" means print the last Hist_print commands. */
|
||
else
|
||
{
|
||
num = hist_len - Hist_print;
|
||
}
|
||
|
||
if (num < 0)
|
||
num = 0;
|
||
|
||
/* If there are at least Hist_print commands, we want to display the last
|
||
Hist_print rather than, say, the last 6. */
|
||
if (hist_len - num < Hist_print)
|
||
{
|
||
num = hist_len - Hist_print;
|
||
if (num < 0)
|
||
num = 0;
|
||
}
|
||
|
||
if (num == hist_len - Hist_print)
|
||
printf_filtered ("The list of the last %d commands is:\n\n", Hist_print);
|
||
else
|
||
printf_filtered ("Some of the stored commands are:\n\n");
|
||
|
||
for (offset = num; offset < num + Hist_print && offset < hist_len; offset++)
|
||
{
|
||
printf_filtered ("%5d %s\n", history_base + offset,
|
||
(history_get (history_base + offset))->line);
|
||
}
|
||
|
||
/* The next command we want to display is the next one that we haven't
|
||
displayed yet. */
|
||
num += Hist_print;
|
||
|
||
/* If the user repeats this command with return, it should do what
|
||
"info editing +" does. This is unnecessary if arg is null,
|
||
because "info editing +" is not useful after "info editing". */
|
||
if (from_tty && arg)
|
||
{
|
||
arg[0] = '+';
|
||
arg[1] = '\0';
|
||
}
|
||
}
|
||
|
||
static void
|
||
set_history_expansion (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
history_expansion_p = parse_binary_operation ("set history expansion", arg);
|
||
}
|
||
|
||
static void
|
||
set_history_write (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
write_history_p = parse_binary_operation ("set history write", arg);
|
||
}
|
||
|
||
static void
|
||
set_history (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
printf ("\"set history\" must be followed by the name of a history subcommand.\n");
|
||
help_list (sethistlist, "set history ", -1, stdout);
|
||
}
|
||
|
||
static void
|
||
set_history_size (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
if (!*arg)
|
||
error_no_arg ("set history size");
|
||
|
||
history_size = atoi (arg);
|
||
}
|
||
|
||
static void
|
||
set_history_filename (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
int i;
|
||
|
||
if (!arg)
|
||
error_no_arg ("history file name");
|
||
|
||
arg = tilde_expand (arg);
|
||
make_cleanup (free, arg);
|
||
|
||
i = strlen (arg) - 1;
|
||
|
||
free (history_filename);
|
||
|
||
while (i > 0 && (arg[i] == ' ' || arg[i] == '\t'))
|
||
i--;
|
||
|
||
if (!*arg)
|
||
history_filename = (char *) 0;
|
||
else
|
||
history_filename = savestring (arg, i + 1);
|
||
history_filename[i] = '\0';
|
||
}
|
||
|
||
int info_verbose;
|
||
|
||
static void
|
||
set_verbose_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
info_verbose = parse_binary_operation ("set verbose", arg);
|
||
}
|
||
|
||
static void
|
||
verbose_info (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
if (arg)
|
||
error ("\"info verbose\" does not take any arguments.\n");
|
||
|
||
printf ("Verbose printing of information is %s.\n",
|
||
info_verbose ? "on" : "off");
|
||
}
|
||
|
||
static void
|
||
float_handler ()
|
||
{
|
||
error ("Invalid floating value encountered or computed.");
|
||
}
|
||
|
||
|
||
static void
|
||
initialize_cmd_lists ()
|
||
{
|
||
cmdlist = (struct cmd_list_element *) 0;
|
||
infolist = (struct cmd_list_element *) 0;
|
||
enablelist = (struct cmd_list_element *) 0;
|
||
disablelist = (struct cmd_list_element *) 0;
|
||
deletelist = (struct cmd_list_element *) 0;
|
||
enablebreaklist = (struct cmd_list_element *) 0;
|
||
setlist = (struct cmd_list_element *) 0;
|
||
sethistlist = (struct cmd_list_element *) 0;
|
||
unsethistlist = (struct cmd_list_element *) 0;
|
||
}
|
||
|
||
static void
|
||
initialize_main ()
|
||
{
|
||
char *tmpenv;
|
||
/* Command line editing externals. */
|
||
extern int (*rl_completion_entry_function)();
|
||
extern char *rl_completer_word_break_characters;
|
||
|
||
/* Set default verbose mode on. */
|
||
info_verbose = 1;
|
||
|
||
prompt = savestring ("(gdb) ", 6);
|
||
|
||
/* Set the important stuff up for command editing. */
|
||
command_editing_p = 1;
|
||
history_expansion_p = 0;
|
||
write_history_p = 0;
|
||
|
||
if (tmpenv = getenv ("HISTSIZE"))
|
||
history_size = atoi (tmpenv);
|
||
else
|
||
history_size = 256;
|
||
|
||
stifle_history (history_size);
|
||
|
||
if (tmpenv = getenv ("GDBHISTFILE"))
|
||
history_filename = savestring (tmpenv, strlen(tmpenv));
|
||
else
|
||
/* We include the current directory so that if the user changes
|
||
directories the file written will be the same as the one
|
||
that was read. */
|
||
history_filename = concat (current_directory, "/.gdb_history", "");
|
||
|
||
read_history (history_filename);
|
||
|
||
/* Setup important stuff for command line editing. */
|
||
rl_completion_entry_function = (int (*)()) symbol_completion_function;
|
||
rl_completer_word_break_characters = gdb_completer_word_break_characters;
|
||
|
||
/* Define the classes of commands.
|
||
They will appear in the help list in the reverse of this order. */
|
||
|
||
add_cmd ("obscure", class_obscure, 0, "Obscure features.", &cmdlist);
|
||
add_cmd ("alias", class_alias, 0, "Aliases of other commands.", &cmdlist);
|
||
add_cmd ("user", class_user, 0, "User-defined commands.\n\
|
||
The commands in this class are those defined by the user.\n\
|
||
Use the \"define\" command to define a command.", &cmdlist);
|
||
add_cmd ("support", class_support, 0, "Support facilities.", &cmdlist);
|
||
add_cmd ("status", class_info, 0, "Status inquiries.", &cmdlist);
|
||
add_cmd ("files", class_files, 0, "Specifying and examining files.", &cmdlist);
|
||
add_cmd ("breakpoints", class_breakpoint, 0, "Making program stop at certain points.", &cmdlist);
|
||
add_cmd ("data", class_vars, 0, "Examining data.", &cmdlist);
|
||
add_cmd ("stack", class_stack, 0, "Examining the stack.\n\
|
||
The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
|
||
counting from zero for the innermost (currently executing) frame.\n\n\
|
||
At any time gdb identifies one frame as the \"selected\" frame.\n\
|
||
Variable lookups are done with respect to the selected frame.\n\
|
||
When the program being debugged stops, gdb selects the innermost frame.\n\
|
||
The commands below can be used to select other frames by number or address.",
|
||
&cmdlist);
|
||
add_cmd ("running", class_run, 0, "Running the program.", &cmdlist);
|
||
|
||
add_com ("pwd", class_files, pwd_command,
|
||
"Print working directory. This is used for your program as well.");
|
||
add_com ("cd", class_files, cd_command,
|
||
"Set working directory to DIR for debugger and program being debugged.\n\
|
||
The change does not take effect for the program being debugged\n\
|
||
until the next time it is started.");
|
||
|
||
add_cmd ("prompt", class_support, set_prompt_command,
|
||
"Change gdb's prompt from the default of \"(gdb)\"",
|
||
&setlist);
|
||
add_com ("echo", class_support, echo_command,
|
||
"Print a constant string. Give string as argument.\n\
|
||
C escape sequences may be used in the argument.\n\
|
||
No newline is added at the end of the argument;\n\
|
||
use \"\\n\" if you want a newline to be printed.\n\
|
||
Since leading and trailing whitespace are ignored in command arguments,\n\
|
||
if you want to print some you must use \"\\\" before leading whitespace\n\
|
||
to be printed or after trailing whitespace.");
|
||
add_com ("document", class_support, document_command,
|
||
"Document a user-defined command.\n\
|
||
Give command name as argument. Give documentation on following lines.\n\
|
||
End with a line of just \"end\".");
|
||
add_com ("define", class_support, define_command,
|
||
"Define a new command name. Command name is argument.\n\
|
||
Definition appears on following lines, one command per line.\n\
|
||
End with a line of just \"end\".\n\
|
||
Use the \"document\" command to give documentation for the new command.\n\
|
||
Commands defined in this way do not take arguments.");
|
||
|
||
add_com ("source", class_support, source_command,
|
||
"Read commands from a file named FILE.\n\
|
||
Note that the file \".gdbinit\" is read automatically in this way\n\
|
||
when gdb is started.");
|
||
add_com ("quit", class_support, quit_command, "Exit gdb.");
|
||
add_com ("help", class_support, help_command, "Print list of commands.");
|
||
add_com_alias ("q", "quit", class_support, 1);
|
||
add_com_alias ("h", "help", class_support, 1);
|
||
|
||
add_cmd ("verbose", class_support, set_verbose_command,
|
||
"Change the number of informational messages gdb prints.",
|
||
&setlist);
|
||
add_info ("verbose", verbose_info,
|
||
"Status of gdb's verbose printing option.\n");
|
||
|
||
add_com ("dump-me", class_obscure, dump_me_command,
|
||
"Get fatal error; make debugger dump its core.");
|
||
|
||
add_cmd ("editing", class_support, set_editing,
|
||
"Enable or disable command line editing.\n\
|
||
Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
|
||
Without an argument, command line editing is enabled.", &setlist);
|
||
|
||
add_prefix_cmd ("history", class_support, set_history,
|
||
"Generic command for setting command history parameters.",
|
||
&sethistlist, "set history ", 0, &setlist);
|
||
|
||
add_cmd ("expansion", no_class, set_history_expansion,
|
||
"Enable or disable history expansion on command input.\n\
|
||
Without an argument, history expansion is enabled.", &sethistlist);
|
||
|
||
add_cmd ("write", no_class, set_history_write,
|
||
"Enable or disable saving of the history record on exit.\n\
|
||
Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
|
||
Without an argument, saving is enabled.", &sethistlist);
|
||
|
||
add_cmd ("size", no_class, set_history_size,
|
||
"Set the size of the command history, \n\
|
||
ie. the number of previous commands to keep a record of.", &sethistlist);
|
||
|
||
add_cmd ("filename", no_class, set_history_filename,
|
||
"Set the filename in which to record the command history\n\
|
||
(the list of previous commands of which a record is kept).", &sethistlist);
|
||
|
||
add_prefix_cmd ("info", class_info, info_command,
|
||
"Generic command for printing status.",
|
||
&infolist, "info ", 0, &cmdlist);
|
||
add_com_alias ("i", "info", class_info, 1);
|
||
|
||
add_info ("editing", editing_info, "Status of command editor.");
|
||
|
||
add_info ("version", version_info, "Report what version of GDB this is.");
|
||
}
|